I also get the recoding-stopping stutter, on a JFS partition, watching non-HD content that only uses 15-20% cpu. I had thought it was transcoding or commflaggin starting, but since you don't see that, it must just be come voodoo recording completion stuff.
I am pretty sure (not 100%) that the ringbuffer only refers to watching Live TV, not recordings. --- Jack Perveiler <[EMAIL PROTECTED]> wrote: > Hello, > > When recordings stop (the recording... not playing back a recording) > I get a > flurry of disk activity for a second or two... usually enough to > cause a > stutter for a second if I'm watching a HD recording at the same time. > So if > I'm watching a HD recording I can pretty much count on some jitter > every half > hour as recordings finish. > > Some info about my system: > > 0) P4 3.0 GHz w/Hyperthreading (HD playback consumes about 70% > processor) > 1) Tuners are HD-3000 and PVR-500 (usually the HD-3000 and one of the > 500 > tuners is recording) > 2) File system is 200 GB XFS LVM local to the machine (combination > frontend/backend). DMA is on (UDMA5). Output from hdparm: > /dev/hda: > multcount = 16 (on) > IO_support = 1 (32-bit) > unmaskirq = 1 (on) > using_dma = 1 (on) > keepsettings = 0 (off) > readonly = 0 (off) > readahead = 256 (on) > geometry = 30515/255/63, sectors = 490234752, start = 0 > > 3) No transcoding or commflagging is going on (they're restricted to > when I'm > sleeping). > > So now for my questions: > > 1) Does myth do some sort of minimal post-processing when a recording > finishes? > Or is this just the OS flushing the remainder of the buffer to disk > and > closing the file? Is this maybe something that XFS is just slow at? > > 2) I see in one of the frontend setup pages you can set the size of a > HD buffer > to help "weather backend storms" (or something like that). Is this > one of > those cases? If not, what exactly is that setting for? > > Thanks, > > --Jack _______________________________________________ mythtv-users mailing list [email protected] http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
